drivers/gpu/drm/mediatek/mtk_drm_plane.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2015 MediaTek Inc.
   4  * Author: CK Hu <[email protected]>
   5  */
   6
   7 #include <drm/drm_atomic.h>
   8 #include <drm/drm_atomic_helper.h>
   9 #include <drm/drm_fourcc.h>
  10 #include <drm/drm_atomic_uapi.h>
  11 #include <drm/drm_plane_helper.h>
  12 #include <drm/drm_gem_framebuffer_helper.h>
  13
  14 #include "mtk_drm_crtc.h"
  15 #include "mtk_drm_ddp_comp.h"
  16 #include "mtk_drm_drv.h"
  17 #include "mtk_drm_gem.h"
  18 #include "mtk_drm_plane.h"
  19
  20 static const u32 formats[] = {
  21         DRM_FORMAT_XRGB8888,
  22         DRM_FORMAT_ARGB8888,
  23         DRM_FORMAT_BGRX8888,
  24         DRM_FORMAT_BGRA8888,
  25         DRM_FORMAT_ABGR8888,
  26         DRM_FORMAT_XBGR8888,
  27         DRM_FORMAT_RGB888,
  28         DRM_FORMAT_BGR888,
  29         DRM_FORMAT_RGB565,
  30         DRM_FORMAT_UYVY,
  31         DRM_FORMAT_YUYV,
  32 };
  33
  34 static void mtk_plane_reset(struct drm_plane *plane)
  35 {
  36         struct mtk_plane_state *state;
  37
  38         if (plane->state) {
  39                 __drm_atomic_helper_plane_destroy_state(plane->state);
  40
  41                 state = to_mtk_plane_state(plane->state);
  42                 memset(state, 0, sizeof(*state));
  43         } else {
  44                 state = kzalloc(sizeof(*state), GFP_KERNEL);
  45                 if (!state)
  46                         return;
  47                 plane->state = &state->base;
  48         }
  49
  50         state->base.plane = plane;
  51         state->pending.format = DRM_FORMAT_RGB565;
  52 }
  53
  54 static struct drm_plane_state *mtk_plane_duplicate_state(struct drm_plane *plane)
  55 {
  56         struct mtk_plane_state *old_state = to_mtk_plane_state(plane->state);
  57         struct mtk_plane_state *state;
  58
  59         state = kzalloc(sizeof(*state), GFP_KERNEL);
  60         if (!state)
  61                 return NULL;
  62
  63         __drm_atomic_helper_plane_duplicate_state(plane, &state->base);
  64
  65         WARN_ON(state->base.plane != plane);
  66
  67         state->pending = old_state->pending;
  68
  69         return &state->base;
  70 }
  71
  72 static void mtk_drm_plane_destroy_state(struct drm_plane *plane,
  73                                         struct drm_plane_state *state)
  74 {
  75         __drm_atomic_helper_plane_destroy_state(state);
  76         kfree(to_mtk_plane_state(state));
  77 }
  78
  79 static int mtk_plane_atomic_async_check(struct drm_plane *plane,
  80                                         struct drm_plane_state *state)
  81 {
  82         struct drm_crtc_state *crtc_state;
  83         int ret;
  84
  85         if (plane != state->crtc->cursor)
  86                 return -EINVAL;
  87
  88         if (!plane->state)
  89                 return -EINVAL;
  90
  91         if (!plane->state->fb)
  92                 return -EINVAL;
  93
  94         ret = mtk_drm_crtc_plane_check(state->crtc, plane,
  95                                        to_mtk_plane_state(state));
  96         if (ret)
  97                 return ret;
  98
  99         if (state->state)
 100                 crtc_state = drm_atomic_get_existing_crtc_state(state->state,
 101                                                                 state->crtc);
 102         else /* Special case for asynchronous cursor updates. */
 103                 crtc_state = state->crtc->state;
 104
 105         return drm_atomic_helper_check_plane_state(plane->state, crtc_state,
 106                                                    DRM_PLANE_HELPER_NO_SCALING,
 107                                                    DRM_PLANE_HELPER_NO_SCALING,
 108                                                    true, true);
 109 }
 110
 111 static void mtk_plane_atomic_async_update(struct drm_plane *plane,
 112                                           struct drm_plane_state *new_state)
 113 {
 114         struct mtk_plane_state *state = to_mtk_plane_state(plane->state);
 115
 116         plane->state->crtc_x = new_state->crtc_x;
 117         plane->state->crtc_y = new_state->crtc_y;
 118         plane->state->crtc_h = new_state->crtc_h;
 119         plane->state->crtc_w = new_state->crtc_w;
 120         plane->state->src_x = new_state->src_x;
 121         plane->state->src_y = new_state->src_y;
 122         plane->state->src_h = new_state->src_h;
 123         plane->state->src_w = new_state->src_w;
 124         swap(plane->state->fb, new_state->fb);
 125         state->pending.async_dirty = true;
 126
 127         mtk_drm_crtc_async_update(new_state->crtc, plane, new_state);
 128 }
 129
 130 static const struct drm_plane_funcs mtk_plane_funcs = {
 131         .update_plane = drm_atomic_helper_update_plane,
 132         .disable_plane = drm_atomic_helper_disable_plane,
 133         .destroy = drm_plane_cleanup,
 134         .reset = mtk_plane_reset,
 135         .atomic_duplicate_state = mtk_plane_duplicate_state,
 136         .atomic_destroy_state = mtk_drm_plane_destroy_state,
 137 };
 138
 139 static int mtk_plane_atomic_check(struct drm_plane *plane,
 140                                   struct drm_plane_state *state)
 141 {
 142         struct drm_framebuffer *fb = state->fb;
 143         struct drm_crtc_state *crtc_state;
 144         int ret;
 145
 146         if (!fb)
 147                 return 0;
 148
 149         if (WARN_ON(!state->crtc))
 150                 return 0;
 151
 152         ret = mtk_drm_crtc_plane_check(state->crtc, plane,
 153                                        to_mtk_plane_state(state));
 154         if (ret)
 155                 return ret;
 156
 157         crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
 158         if (IS_ERR(crtc_state))
 159                 return PTR_ERR(crtc_state);
 160
 161         return drm_atomic_helper_check_plane_state(state, crtc_state,
 162                                                    DRM_PLANE_HELPER_NO_SCALING,
 163                                                    DRM_PLANE_HELPER_NO_SCALING,
 164                                                    true, true);
 165 }
 166
 167 static void mtk_plane_atomic_disable(struct drm_plane *plane,
 168                                      struct drm_plane_state *old_state)
 169 {
 170         struct mtk_plane_state *state = to_mtk_plane_state(plane->state);
 171
 172         state->pending.enable = false;
 173         wmb(); /* Make sure the above parameter is set before update */
 174         state->pending.dirty = true;
 175 }
 176
 177 static void mtk_plane_atomic_update(struct drm_plane *plane,
 178                                     struct drm_plane_state *old_state)
 179 {
 180         struct mtk_plane_state *state = to_mtk_plane_state(plane->state);
 181         struct drm_crtc *crtc = plane->state->crtc;
 182         struct drm_framebuffer *fb = plane->state->fb;
 183         struct drm_gem_object *gem;
 184         struct mtk_drm_gem_obj *mtk_gem;
 185         unsigned int pitch, format;
 186         dma_addr_t addr;
 187
 188         if (!crtc || WARN_ON(!fb))
 189                 return;
 190
 191         if (!plane->state->visible) {
 192                 mtk_plane_atomic_disable(plane, old_state);
 193                 return;
 194         }
 195
 196         gem = fb->obj[0];
 197         mtk_gem = to_mtk_gem_obj(gem);
 198         addr = mtk_gem->dma_addr;
 199         pitch = fb->pitches[0];
 200         format = fb->format->format;
 201
 202         addr += (plane->state->src.x1 >> 16) * fb->format->cpp[0];
 203         addr += (plane->state->src.y1 >> 16) * pitch;
 204
 205         state->pending.enable = true;
 206         state->pending.pitch = pitch;
 207         state->pending.format = format;
 208         state->pending.addr = addr;
 209         state->pending.x = plane->state->dst.x1;
 210         state->pending.y = plane->state->dst.y1;
 211         state->pending.width = drm_rect_width(&plane->state->dst);
 212         state->pending.height = drm_rect_height(&plane->state->dst);
 213         state->pending.rotation = plane->state->rotation;
 214         wmb(); /* Make sure the above parameters are set before update */
 215         state->pending.dirty = true;
 216 }
 217
 218 static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = {
 219         .prepare_fb = drm_gem_fb_prepare_fb,
 220         .atomic_check = mtk_plane_atomic_check,
 221         .atomic_update = mtk_plane_atomic_update,
 222         .atomic_disable = mtk_plane_atomic_disable,
 223         .atomic_async_update = mtk_plane_atomic_async_update,
 224         .atomic_async_check = mtk_plane_atomic_async_check,
 225 };
 226
 227 int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane,
 228                    unsigned long possible_crtcs, enum drm_plane_type type,
 229                    unsigned int supported_rotations)
 230 {
 231         int err;
 232
 233         err = drm_universal_plane_init(dev, plane, possible_crtcs,
 234                                        &mtk_plane_funcs, formats,
 235                                        ARRAY_SIZE(formats), NULL, type, NULL);
 236         if (err) {
 237                 DRM_ERROR("failed to initialize plane\n");
 238                 return err;
 239         }
 240
 241         if (supported_rotations & ~DRM_MODE_ROTATE_0) {
 242                 err = drm_plane_create_rotation_property(plane,
 243                                                          DRM_MODE_ROTATE_0,
 244                                                          supported_rotations);
 245                 if (err)
 246                         DRM_INFO("Create rotation property failed\n");
 247         }
 248
 249         drm_plane_helper_add(plane, &mtk_plane_helper_funcs);
 250
 251         return 0;
 252 }